TLC5960

VADJ

EN

CTRL[1:4]

HVM[1:4]

XFLT

VREG5

VIN

D1 G1 S1

D2

D8

G2

G8

S2

S8

Ch1

Ch2

Ch8

DC/DC4

DC/DC3

DC/DC2

DC/DC1

V

LED1

V

LED4

TLC5960

www.ti.com

SBVS147 – SEPTEMBER 2010

Eight-Channel LED Driver

with Intelligent Headroom Voltage Monitor (iHVM™)

Check for Samples: TLC5960

1

FEATURES

•

Full Protection/Diagnostic Functions:

23

•

250kHz PWM Dimming

–

LOD: LED Open Detection

•

Four Intelligent Headroom Voltage Monitor

–

LSD: LED Short Detection

(iHVM) Outputs

–

FOD: FET Open Detection

•

Eight-Channel, High-Voltage LED Driver:

–

FSD: FET Short Detection

–

0.3% (typ) Accuracy Between Channels

•

Built-In Phase Shift Function

•

Control Interface with Four PWM Inputs

•

38-Pin TSSOP Package

•

Easy-To-Use Analog Dimming Interface

APPLICATIONS

•

10% to 100% Analog Brightness Dimming

•

LED Backlights for LCD-TV

•

Integrated 5V Internal Regulator

•

High-Current LED Lighting

•

Integrated Power-On Reset (POR) Circuitry

DESCRIPTION

The TLC5960 is an eight-channel PWM LED driver with four intelligent headroom voltage monitor (iHVM)

outputs. The LED drivers have scalable, high-voltage capability and provide 1% maximum current matching

accuracy between LED strings. To achieve optimal efficiency, the iHVM automatically optimizes the external

dc/dc converter output voltage to compensate for the forward-voltage variations of the LED

Compared to a conventional HVM solution that requires several MOSFETs, capacitors, and resistors, the iHVM

is designed to use only a single external resistor. The LED driver design is capable of up to 250kHz PWM

dimming, and also provides an analog brightness dimming interface. This device easily adapts to various LED

and power configurations with a single voltage input rail. Full protection and diagnostic functions are provided to

protect the entire system, such as LED open/short detection (LOD/LSD), FET open/short detection (FOD/FSD)

and thermal shutdown (TSD). In case of failure, the TLC5960 automatically disconnects the failed channel(s)

from the operating channels and pulls down the open drain fault buffer (XFLT) to signal an error status. iHVM™

Typical Application Circuit

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

iHVM is a trademark of Texas Instruments.

3

All other trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2010, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.